two *(one - (two *x + three)/(x + six) + (x^ two + three *x - eighteen)/(x + six)^ two)/(x + six) = zero
2 multiply by (1 minus (2 multiply by x plus 3) divide by (x plus 6) plus (x squared plus 3 multiply by x minus 18) divide by (x plus 6) squared ) divide by (x plus 6) equally 0
two multiply by (one minus (two multiply by x plus three) divide by (x plus six) plus (x to the power of two plus three multiply by x minus eighteen) divide by (x plus six) to the power of two) divide by (x plus six) equally zero